I wrote many times that for cryptocurrencies and p2p exchanges, you need to open separate accounts in other banks, and not engage in this activity on the main cards where you receive wages or benefits. But you still need a wholesale lawyer to communicate with the bank if you have a large amount blocked.
I don't know your situation. If I were you, I would find out from the bank what they need on my own. If they started asking me questions, I would say that I don’t understand anything about it, so I’ll come tomorrow with my lawyer and give all the answers. If this is possible in your country, then this is a good option.